Buffer Overflow Vulnerability in Linux Kernel - CVE-2025-37927
Summary
CVE-2025-37927: In the Linux kernel, the following vulnerability has been resolved: iommu/amd: Fix potential buffer overflow in parse_ivrs_acpihid There is a string parsing logic error which can lead to an overflow of hid or uid buffers... Affects linux versions 5.10.103-1 – 6.9.9-1. No fix is published. How to fix ↓
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Background
The Linux kernel is the core component of many operating systems, providing essential services for hardware and software interactions. It is known for its stability, performance, and security features. However, the kernel is susceptible to vulnerabilities that can compromise system integrity. CVE-2025-37927 highlights a critical issue in the IOMMU subsystem related to AMD hardware, where improper string parsing can lead to buffer overflows, potentially allowing attackers to exploit the system.
Vulnerability Detail
CVE-2025-37927 is a vulnerability found in the Linux kernel's IOMMU subsystem, specifically in the AMD implementation. The issue arises from a string parsing logic error that fails to properly account for the lengths of individual HID and UID buffers when comparing against a total string length. This oversight can lead to buffer overflows, where data exceeding the buffer size can overwrite adjacent memory, potentially leading to system crashes or unauthorized access. The vulnerability was identified by the Linux Verification Center and poses a significant risk to systems using affected versions of the Linux kernel.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a temporary workaround, users can limit the use of affected features or disable IOMMU support in the BIOS settings until a patch is applied. This can help mitigate the risk of exploitation until the system is updated.
Conclusion
CVE-2025-37927 is a significant vulnerability in the Linux kernel that can lead to buffer overflows and potential system exploitation. It is crucial for users to update their systems to the latest patched versions to mitigate risks. Utilizing tools like Vulert can help monitor and manage vulnerabilities effectively.
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FAQ
CVE-2025-37927 is a buffer overflow vulnerability in the Linux kernel's IOMMU subsystem that can lead to potential system exploitation.
You can use Vulert to monitor and alert for open-source vulnerabilities in your software. Visit Vulert Scanner to check if your application is affected by this vulnerability.
The risks include system crashes, unauthorized access, and potential exploitation by attackers to execute arbitrary code.
To apply the patch, update your Linux kernel using your package manager. For Debian systems, use 'sudo apt-get update && sudo apt-get upgrade linux'.
Yes, you can disable IOMMU support in your BIOS settings as a temporary workaround until the patch is applied.
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